CN101019041A - Detector for radiation directivity, and method and device for monitoring radiations - Google Patents
Detector for radiation directivity, and method and device for monitoring radiations Download PDFInfo
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- G01T1/16—Measuring radiation intensity
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- G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
- G01T1/00—Measuring X-radiation, gamma radiation, corpuscular radiation, or cosmic radiation
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Abstract
A radiation directivity detector for detecting the direction of incidence of radiation comprises scintillators (41, 42, 43) (101, 102, 103) made of the same material and arranged in a circumferential direction in such a way that they cast their shadows on one another with respect to radiation incident in a circumferential direction and overlap with one another, and the light emitted from one scintillator does not enter any other scintillator and light-receiving elements (51, 52, 53) (111, 112, 113) having light-receiving surfaces optically joined to the respective scintillators. Since the combination of the proportion of the radiation directly entering one scintillator and the proportion of the radiation indirectly entering the scintillator because of the block of another scintillator vary with the circumferential incidence direction, the weight of the detector is decreased, the efficiency of radiation detection is improved, information detected by measurement over a half or the full circumferential length is made more detail, and the operability is improved by simplified setting.
Description
Technical field
The present invention relates in the field of use radiomaterial such as nuclear industry, radioactive ray medical treatment, radioactive ray industrial detection, Non-Destructive Testing or radioactive ray, to be used to detect radioactive ray directivity detecting device and radiation detecting method and device by the incident direction of the gamma ray of radially incident or beta ray isoradial.Relate in particular to be applicable to around nuclear facilities such as nuclear power station, detect the monitoring station leak into the radioactive ray in the environment, have than the radioactive ray directivity detecting device of wide directionality and use the radioactive ray monitoring method and the device of this detecting device.
Background technology
As the existing gamma detector of measuring instrument or monitoring station is that the counting that is used to obtain time per unit is that the dosage of counting rate or time per unit is the device of dose rate.
Therefore, in order to measure important information such as radiation direction, adopted install on the gamma detector both big and heavy lead system collimator, and only passed through should a direction of lead collimator on the sensitivity of method of acquisition gamma ray.Yet in the method, plumbous system collimator becomes weight, makes detecting device become big, therefore exists to be unfavorable for the problem that moves.In addition, because therefore gamma ray also exists the counting rate of the radioactive ray that can't obtain in this case (from all direction incident) or the problem of dose rate only from a part of incident of detecting device.
To address the above problem is purpose, for example, the spy open that flat 5-66275 communique put down in writing like that, developed radiation detector 30.In this radiation detector 30, as shown in Figure 1, the flat thin plastic scintillator 32 of 5mm etc. is coupled to the place ahead and CsI (Tl) scintillater 34 is coupled to the rear, and the relation of the shape facility of the size of the electric pulse that is produced during according to gamma ray incident or rising edge, negative edge etc. produces directivity.Among Fig. 3,36 is photo-electric conversion element, and 38 are the shading shell.
Yet, when (1) gamma ray of the 662keV of, for example Cs137 less when the density of plastic scintillator 32 is from the place ahead incident, the probability of above-mentioned plastic scintillator 32 reactions adopts the open code EGS4 institute result calculated of Monte Carlo simulation approach for example to be up to about 5%, and 95% do not play any CsI (Tl) scintillater 34 that enters into the rear corresponsively, becomes imponderable in theory state.That is, the lower problem of gamma ray detection efficient has taken place.In addition, the sensitivity of (2) response has than big difference because of incident angle is different.That is and since with plastic scintillator 32 over against the place ahead direction on sensitivity higher, and depart from 20 degree in the horizontal or 20 sensitivity when above sharply descend, so not towards the monitoring station that must have wide directionality etc.And (3) need be used to discern the other operation of complicated factors such as the size of electric pulse or shape when direction initialization.In addition, (4) do not have sensitivity fully at the rear of detecting device.And (5) also exist the counting rate of the radioactive ray that can't obtain this occasion, the problem of dose rate.
Summary of the invention
In order to address the above problem, the inventor has developed as putting the doctor and has ground the radiation detector shown in NEWS September number, No.94,2004 (hereinafter referred to as the list of references).The present invention is then by solving same problem with the list of references diverse ways.
Identical with list of references, the present invention with the lightweight that reaches detecting device, improve the detection efficiency of radioactive ray, measurement by half cycle or complete cycle direction and reach the detailed-oriented of detection information and set by simplifying that to improve operability be problem.
The present invention relates to a kind of radioactive ray directivity detecting device that is used to detect the incidence of radiation direction, it is characterized in that, possess: a plurality of scintillaters, at least set so that make it form shade mutually and constitute with partially overlapping in a circumferential direction, and make the luminous scintillater that can not incide other of certain scintillater by identical material with respect to radioactive ray from circumferencial direction incident; And photo detector, has sensitive surface with each scintillater optical coupled, the radioactive ray of the direct incident in each scintillater are the combination of the ratio of the radioactive ray of incident indirectly with the shade that becomes other scintillaters, because of the incident direction on the circumferencial direction different different, thus, the problems referred to above have been solved.
In addition, described scintillater is 2, can detect from the incident direction of 0 degree until the half cycle of 180 degree.
Perhaps, described scintillater is more than 3 or 3, detects the incident direction from 0 degree to the complete cycle of 360 degree.
In addition, described scintillater is along the circumferential direction to be divided into single scintillater a plurality of and to form, the characteristic unanimity, and be easy to make.
In addition, on described each scintillater, connect the mutually different amplifier of magnification respectively, be connected with single A/D converter on this amplifier, be connected with wave height analyser on this A/D converter, and can analyze at an easy rate corresponding to each scintillater.
In addition, also can on described each scintillater, connect amplifier respectively, connect the mutually different A/D converter of conversion ratio on each amplifier, be connected with wave height analyser on this A/D converter, and can analyze at an easy rate equally corresponding to each scintillater.
Perhaps, can also on described each scintillater, connect amplifier respectively, connect A/D converter on each amplifier respectively, connect the wave height analyser on each A/D converter respectively, thereby can carry out high accuracy analysis.
The present invention also provides a kind of radioactive ray monitoring method, it is characterized in that, uses above-mentioned radioactive ray directivity detecting device.
In addition, also provide a kind of radioactive ray monitoring device, it is characterized in that, possess above-mentioned radioactive ray directivity detecting device.
According to the present invention, can to 360 whole circumference scope, obtain incident direction at 0 degree to 180 half cycles of spending or 0 degree, and obtain the also more stable detecting device of sensitivity of direction with direct numerical value.In addition, can obtain directivity arbitrarily by setting ratio, and realize the measuring instrument of band alarm.Moreover, owing to need not the collimator of plumbous system, thus can realize lightweight, and mobility is more outstanding.In addition, by knowing incident direction, thereby can determine radiogenic position to a plurality of detecting devices.Therefore, from the viewpoint of radioactive ray management, protection, monitoring, can obtain when usual and effective pick-up unit very the time.Especially, when using identical scintillater, also be easy to dose evaluation.
Description of drawings
Fig. 1 is the sectional view of the radiation detector put down in writing of expression patent documentation 1.
Fig. 2 is the stereographic map of the structure of expression the present invention the 1st embodiment.
Fig. 3 is (A) planimetric map and (B) sectional view of the structure of the present invention's the 1st embodiment.
Fig. 4 is the exploded perspective view of the scintillater part of the present invention's the 1st embodiment.
Fig. 5 is the structured flowchart of the measurement mechanism of the present invention's the 1st embodiment.
Fig. 6 is the structured flowchart of the control device of the present invention's the 1st embodiment.
Fig. 7 is the planimetric map of explanation measuring principle of the present invention.
Fig. 8 is the workflow diagram of expression the 1st embodiment.
Fig. 9 be in the present invention's the 1st embodiment with the line chart of the example of the ratio of incident direction.
Figure 10 is the planimetric map of the variation of coupled scintillation device.
Figure 11 is the structured flowchart of the measurement mechanism of expression the present invention the 2nd embodiment.
Figure 12 is the structured flowchart of the measurement mechanism of the present invention's the 3rd embodiment.
Figure 13 is (A) planimetric map and (B) sectional view of the structure of the present invention's the 4th embodiment.
Figure 14 is the spectrum of the embodiment of the 1st embodiment.
Figure 15 is (A) planimetric map and (B) front view (FV) of the structure of application examples of the present invention.
Embodiment
Below, the embodiment that present invention will be described in detail with reference to the accompanying.
Shown in Fig. 2 (stereographic map), Fig. 3 (A) (planimetric map), Fig. 3 (B) (sectional view of seeing from the front) and Fig. 4 (exploded perspective view of coupled scintillation device), the test section 40 of the gamma ray directivity detecting device in the present invention's the 1st embodiment comprises: coupled scintillation device 44, with high density and high 41,42,43 couplings of the fan-shaped scintillater with 120 degree drift angles of luminescence efficiency, form cylindric; Photo detector 51,52,53, be arranged on this coupled scintillation device 44 rectangular directions on, and sensitive surface with optical coupled.
The luminous reflecting material 45,46 that incides other scintillaters that is used to prevent certain scintillater is installed on the interface of each fan- shaped scintillater 41,42,43.Using like this under the situation of reflecting material, certain scintillater luminous can this scintillater of reflected back in, and detection efficiency is higher.In addition, prevent that the method for the interference between scintillater is not limited to this, for example also can use absorbing material, perhaps vacate to come at interval and total reflection takes place on inside surface at scintillater across air.
The periphery of above-mentioned test section 40 is coated with and can sees through gamma ray and lighttight cylindrical case (not shown).
Detailed expression as Fig. 5, the built-in detecting device 61 that constitutes by above-mentioned scintillater 41 and photo detector 51 in above-mentioned test section 40, the detecting device 62 that above-mentioned scintillater 42 and photo detector 52 constitute, the detecting device 63 that above-mentioned scintillater 43 and photo detector 53 constitute, and be connected with to each detecting device 61,62, the supply unit 60 of 63 power supplies, import each detecting device 61,62,63 output signal is also amplified the control device 70 that obtains spectral line after A/D changes, the peak value software for calculation of the photoelectricity peak value being counted according to above-mentioned spectral line 81 is installed, with each scintillater 41,42, the ratio R of the count value of 43 caused photoelectricity peak values, and the computing machine (CPU) 80 of the ratio software for calculation 82 of output incident direction, demonstration is by the incident direction display 90 of the incident direction that this CPU80 calculated, preestablish the alarm setting device 91 of the incident direction scope that alarm takes place by above-mentioned ratio R, and the warning horn 92 that alarm takes place when above-mentioned ratio R enters this scope.
For example, as shown in Figure 6, above-mentioned control device 70 comprises and enlargement factor mutually different 3 amplifiers 71,72,73 identical with scintillater, single A/D converter 74 and 3 channels identical with scintillater quantity or the multichannel wave height analyser 77 more than it.
The following describes the effect of the 1st embodiment.
In the present embodiment, one type scintillater is divided into 3 scintillaters 41,42,43 with 120 degree drift angles, coating reflecting material 45,46 and interconnecting on divisional plane, form 1 coupled scintillation device 44, and, with each scintillater 41,42,43 respectively with the sensitive surface optical coupled of photo detector 51,52,53, thereby constitute test section 40.
As the fan- shaped scintillater 41,42,43 of above-specified high density, for example, can use the NaI high (Tl) scintillater to gamma ray detection efficient, constitute the detecting device that 0 degree is had effective directivity to the whole circumference direction of 360 degree.
Like this, if use NaI (Tl) in scintillater 41,42,43, then compare with plastic scintillator, the detection efficiency of gamma ray is improved, photoelectric probability also is improved.
Now, in the planimetric map of Fig. 7 (A) circumferential locations of coupled scintillation device 44 with the left direction of coupled scintillation device 44 be 0 degree, its right direction that is rotated counterclockwise be 180 degree so that rotate a circle after direction be 360 degree.Shown in Fig. 7 (A), when gamma ray during from 60 degree direction incidents of coupled scintillation device 44, some causes photoelectric effect in scintillater 41, some does not react in scintillater 41 and see through and in scintillater 42,43 photoelectric effect takes place.The light pulse that photoelectric effect produced by each scintillater 41,42,43 is converted to charge pulse respectively by pairing photo detector 51,52,53, and to control device 70 outputs.
With process flow diagram shown in Figure 8 formation entire process step control device 70, that comprise amplifier 71,72,73, A/D converter 74, wave height analyser 77 is described.
Can be luminous when gamma ray or beta ray isoradial incide scintillater 41,42,43 and produce light pulse (step 1000).This light pulse is by photo detector 51,52,53 detections and carry out opto-electronic conversion (step 1010), this faint analog electrical output signal is amplified (step 1020) by amplifier 71,72,73 with predetermined enlargement factor, and then, carry out the A/D conversion to obtain digital signal (step 1030) by 74 pairs of these amplifying signals of A/D converter, analyze to obtain peak value 41P, 42P, 43P (step 1040) by 77 pairs of these digital signals of multichannel wave height analyser corresponding to light pulse intensity.
At this, photo detector is not limited to be made of a photomultiplier, also comprises: the multi-anode photomultiplier of electric signal that is constituted and detected simultaneously luminous, this each photo detector position of output expression of a plurality of scintillaters by a plurality of photomultipliers.
Because above-mentioned scintillater 41,42,43 all is identical material, so, can't discern by the wave height analyser 77 of back like this.Therefore, as shown in Figure 6, in the present embodiment, by changing the enlargement factor of the amplifier 71,72,73 in the control device 70, thereby carry out the A/D conversion by A/D converter 74 after, can discern by single multichannel wave height analyser 77, thereby seek to reduce cost.In addition, also can adopt with the corresponding single channel wave height of scintillater quantity analyser and replace single multichannel wave height analyser.
That is, each charge pulse is input to amplifier 71,72,73 respectively, if the ratio of the enlargement factor of amplifier 71 is made as 100%, then amplifier 72 is for example 50%, and amplifier 73 is for example 25%, and is input to A/D converter 74.At this, the relation (=rate of change) of wave height value and digital numerical value all can be set arbitrarily in the relation (=enlargement factor) of charge pulse amount in the amplifier and wave height value and the A/D converter.
Then, carry out digitizing, obtain spectral line 77S by wave height analyser 77 by A/D converter 74.In wave height analyser 77 as shown in Figure 6, carry out the spectral line that wave height is analyzed for the ease of understanding, having shown, but in fact wave height analyser 77 also can not have the function that shows spectral line.
Then, obtain the count value of each peak value, for example, obtain the counting of peak value 43P of peak value 42P, the scintillater 43 of peak value 41P, the scintillater 42 of scintillater 41 by practical already peak value software for calculation 81.Its count value is designated as A, B, C, obtains its aggregate value by ratio software for calculation 82, and calculating ratio R=(A/T, B/T, C/T).Shown in Fig. 7 (A), when gamma ray during from the incidents of incident direction 60 degree, owing to do not become the object of shade, promptly do not become the object of masking material and direct incident gamma ray with respect to scintillater 41, so the count value maximum of peak value 41P, and the peak value 42P, the count value of 43P of scintillater 42,43 that becomes the shade of scintillater 41 diminishes.For example, can obtain R=(3/5,1/5,1/5).
Secondly, shown in Fig. 7 (B), when gamma ray during from the incidents of incident direction 300 degree, because the object that becomes shade with respect to scintillater 43 does not promptly become the object of masking material and direct incident gamma ray, the count value maximum of peak value 43P, and the peak value 41P that is counted in the scintillater 41,42 of the shade that becomes scintillater 43, the count value of 42P diminish, for example, can obtain R=(1/5,1/5,3/5).
From 0 the degree to 360 the degree scopes in, each ratio R is 1/5～3/5 scope in this example.
Like this, spend to 360 degree directions from 0, directly incident changes with the ratio of incident indirectly, and each ratio R changes as curve 41G, the 42G of Fig. 9,43G.Otherwise, by obtaining the combination of this ratio R, thereby can know the incident direction of gamma ray.
In addition, if set the scope of the ratio R that alarm takes place, then, can give the alarm by warning horn 92 when gamma ray during from this direction incident by alarm setting device 91.
In the present embodiment, the quantity of scintillater is 3, so can detect 0 degree all circumferencial directions to 360 degree.In addition, the quantity of scintillater is not limited to 3, is only needing to detect 0 degree to the situation of the half cycle direction of 180 degree, and scintillater also can be 2.In addition, also can be more than 4 or 4.
The shape of coupled scintillation device 44 also is not limited to cylindric, also can be quadrangular or polygon prism, cylindroid or the hollow and annular shown in Figure 10 (B) such as six prisms shown in Figure 10 (A) and within it side be provided with photo detector 51,52,53.
Below, the gamma ray directivity detecting device of the present invention's the 2nd embodiment is described, in the gamma ray directivity detecting device of the 1st embodiment, changed the enlargement factor of amplifier 71,72,73, and in the present embodiment, as shown in figure 11, the enlargement factor of amplifier 71,72,73 is (for example all being 100%) of fixing, after carrying out the A/D conversion by the conversion ratio that changes A/ D converter 74,75,76, can discern by single multichannel wave height analyser 77, thereby reduce cost.
Adopt Figure 12 that the 3rd embodiment that has adopted other signal processing methods is described below.Produce charge pulses by photo detector 41,42,43, as shown in figure 12, each charge pulse is input to the amplifier 71,72,73 of enlargement factor identical (for example 100%), and is input to independently A/ D converter 74,75,76 respectively.Then, obtain spectral line by the single channel wave height analyser 77,78,79 after the digitizing.Then, obtain its aggregate value T by practical peak value software for calculation 82, and calculating ratio R=(A/T, B/T, C/T).Below, as mentioned above, the incident direction of gamma ray can be known, and alarm can be set.
The following describes the gamma ray directivity detecting device of the present invention's the 4th embodiment, then shown in Figure 13 (A) (planimetric map) and Figure 13 (B) (from the sectional view of top view), this test section 100 along the circumferential direction be provided with cylindric scintillater 101 meet at right angles direction and have the sensitive surface of optical coupled photo detector 111, with cylindric scintillater 102 meet at right angles the direction setting and have the sensitive surface of optical coupled photo detector 112, with the meet at right angles direction configuration and have the photo detector 113 of the sensitive surface of optical coupled of cylindric scintillater 103.
Its function except that the curve shape of Fig. 9 than the complexity, other are all identical with the 1st embodiment, its detailed description is omitted.
Embodiment
In Fig. 1, the 1st embodiment shown in Figure 4, on NaI (Tl) scintillater 41,42,43 of the fan-shaped post that diameter 75mm, thick 50mm, drift angle 120 are spent, be pasted with thin aluminium foil as light reflecting material 45,46,47, and each scintillater is coupled as coupled scintillation device 44, be that the photomultiplier of 25mm constitutes test section 40 as photo detector 51,52,53 with diameter.The material of test section 40 shells becomes the visible light that disturbs the light that scintillater sent or ultraviolet aluminium that covers or stainless steel etc.
The high voltage that provides about 800V to test section 61,62,63 by supply unit 60.
At this, prepare Cs137 as employed typical gamma-ray sources such as the correction that is used for common measuring instrument etc. or commercial measurement device, nondestructive monitoring devices.Radiation energy intensity is faint 3.7MBq.
Above-mentioned radiographic source is arranged on apart from the position of scintillater coupling surface center 100cm, rotates to 360 degree from 0 degree on the circumferencial direction of relative cylinder axis, and counting is 300 seconds on each direction.This condition in fact with in the common intensity of distance be on the radiographic source 10cm position of 37GBq counting to incide the gamma ray number of coupled scintillation device 44 in the time of 3 seconds identical.
Action when the following describes gamma ray from 60 degree direction incidents.The majority of penetrating the gamma ray that comes simultaneously reacts in NaI (Tl) scintillater 41, is produced the light pulse of certain intensity in this reaction by photoelectric effect.This light pulse is converted to charge pulse and output by the photomultiplier 51 as photo detector pro rata with its intensity.This output is amplified in proportion by the amplifier in the control device 70 71.The high channel zone of output in spectral line as shown in figure 14 from this amplifier 71 produces channel peak value 41P.On the other hand, some gamma ray transmissive is crossed scintillater 41, produces above-mentioned photoelectric effect on scintillater 42,43, and the low channel region in spectral line produces peak value 42P, 43P.Like this, discern peak value by the general peak value software for calculation 81 that is built among the CPU 80, and can obtain the count value of these peak values.Then, come calculating ratio R according to the ratio software for calculation that is built among this CPU 80.
Consider the situation of gamma ray below from 300 degree direction incidents.At this moment, because gamma ray is directly incident on scintillater 43,, become bigger count value so produce bigger peak value 43P.On the contrary, because gamma ray incides scintillater 41,42 indirectly, so peak value 41P, 42P are less.Ratio R can similarly be calculated.
The such ratio R and the relation of incident direction can obtain curve 41G, 42G, 43G as shown in Figure 9.Try to achieve according to measurement that ratio R=(A/T, B/T C/T), thereby can determine incident direction according to curve.
In addition, if set the scope of ratio R, then when ratio R enters into this scope, produce alarms by warning horn 92 by alarm setting device 91.
Like this, except obtaining the incident direction, also has the function that produces alarm with numerical value.
Present embodiment has used NaI (Tl) scintillater, but also can use CsI (Tl) scintillater or BGO scintillater and other scintillater to replace.
The diameter of above-mentioned coupled scintillation device 44 is 75mm as embodiment, and hope can detect the energy of wide region that 137Cs with 662keV is the 50～2000keV at center, but when the 60Co that detects high-energy (1333keV) etc., its diameter is bigger 100mm; On the contrary, when the 241Am that detects low-yield (60keV) etc., its diameter is less 50mm, can enlarge the amplitude of curve shown in Figure 9 in view of the above.
In addition, as for the optical coupled of the sensitive surface of each scintillater and photo detector, direct-coupled structure is textural more or less freely, but also can carry out indirect coupling through optical fiber etc.
Shown in Figure 15 (A) (planimetric map) and Figure 15 (B) (front view (FV)), detecting device of the present invention can be installed on the stationary installations 202 such as tripod or column, as being arranged on nuclear facilities 210 a plurality of gamma ray monitoring stations 204 with wide directionality on every side.In addition, also can be as gamma ray measuring appliance with wide directionality.
In addition, detected object is not limited to gamma ray, detects by the direction of using mica etc. also can be used for beta ray.At this moment, can promptly detect the place of surface contamination.
The present invention can be used in the incident direction of the field of use radiomaterial such as nuclear industry, radioactive ray medical treatment, radioactive ray industrial detection, Non-Destructive Testing or radioactive ray detection by the gamma ray or the beta ray isoradial of circumferencial direction incident.
Claims (9)
1. radioactive ray directivity detecting device that is used to detect the incidence of radiation direction is characterized in that possessing:
A plurality of scintillaters set so that make it form shade mutually with respect to the radioactive ray from circumferencial direction incident and be made of identical material with partially overlapping at least in a circumferential direction, and make the luminous scintillater that can not incide other of certain scintillater; And
Photo detector has the sensitive surface with each scintillater optical coupled,
The radioactive ray of the direct incident in each scintillater are the indirectly combination of the ratio of the radioactive ray of incident with the shade that becomes other scintillaters, because of the incident direction on the circumferencial direction different different.
2. radioactive ray directivity detecting device as claimed in claim 1 is characterized in that described scintillater is 2, detects from the incident direction of 0 degree until the half cycle of 180 degree.
3. radioactive ray directivity detecting device as claimed in claim 1 is characterized in that described scintillater is more than 3 or 3, detects the incident direction from 0 degree to the complete cycle of 360 degree.
4. as any described radioactive ray directivity detecting device in the claim 1～3, its spy
Levy and be, described scintillater is along the circumferential direction to be divided into single scintillater a plurality of and to form.
5. as any described radioactive ray directivity detecting device in the claim 1～4, it is characterized in that, on described each scintillater, connect the mutually different amplifier of magnification respectively, be connected with single A/D converter on this amplifier, be connected with wave height analyser on this A/D converter corresponding to each scintillater.
6. as any described radioactive ray directivity detecting device in the claim 1～4, it is characterized in that, on described each scintillater, connect amplifier respectively, be connected with the mutually different A/D converter of conversion ratio on each amplifier, be connected with wave height analyser on this A/D converter corresponding to each scintillater.
7. as any described radioactive ray directivity detecting device in the claim 1～4, it is characterized in that, on described each scintillater, be connected with amplifier respectively, be connected with A/D converter on each amplifier respectively, be connected with the wave height analyser on each A/D converter respectively.
8. a radioactive ray monitoring method is characterized in that, uses as any described radioactive ray directivity detecting device in the claim 1～7.
9. a radioactive ray monitoring device is characterized in that, possesses as any described radioactive ray directivity detecting device in the claim 1～7.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP014578/2005 | 2005-01-21 | ||
| JP2005014578A JP4159052B2 (en) | 2005-01-21 | 2005-01-21 | Radiation direction detector, radiation monitoring method and apparatus |
| PCT/JP2006/300148 WO2006077752A1 (en) | 2005-01-21 | 2006-01-10 | Radiation directivity detector, and radiation monitoring method and device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101019041A true CN101019041A (en) | 2007-08-15 |
| CN101019041B CN101019041B (en) | 2011-05-25 |
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Family Applications (1)
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|---|---|---|---|
| CN2006800008435A Expired - Fee Related CN101019041B (en) | 2005-01-21 | 2006-01-10 | Detector for radiation directivity, and method and device for monitoring radiations |
Country Status (5)
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|---|---|
| US (1) | US7655912B2 (en) |
| EP (1) | EP1840596B1 (en) |
| JP (1) | JP4159052B2 (en) |
| CN (1) | CN101019041B (en) |
| WO (1) | WO2006077752A1 (en) |
Cited By (3)
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| CN102608645A (en) * | 2012-03-08 | 2012-07-25 | 重庆地质仪器厂 | Ray meter |
| CN103675890A (en) * | 2012-09-21 | 2014-03-26 | 日立民用电子株式会社 | Radiation measurement apparatus and radiation measurement method |
| CN104040374A (en) * | 2012-01-13 | 2014-09-10 | 独立行政法人放射线医学综合研究所 | Radioactive substance detection device, radiation source location visibility system, and radioactive substance detection method |
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| JP4127840B2 (en) * | 2005-11-30 | 2008-07-30 | 独立行政法人放射線医学総合研究所 | Radiation measurement apparatus and data processing method |
| GB2440588B (en) * | 2006-08-04 | 2009-09-09 | Symetrica Ltd | Gamma-Ray detector |
| JP4766263B2 (en) * | 2006-11-29 | 2011-09-07 | 独立行政法人放射線医学総合研究所 | Radiation omnidirectional incidence direction detection apparatus, and radiation monitoring method and apparatus |
| JP4734618B2 (en) * | 2006-12-14 | 2011-07-27 | 独立行政法人放射線医学総合研究所 | Radiation measurement equipment |
| EP2146225A1 (en) * | 2008-07-14 | 2010-01-20 | ICx Technologies GmbH | Detector system with positioning system |
| EP2146226A1 (en) * | 2008-07-14 | 2010-01-20 | ICx Technologies GmbH | Detector system for the measurement of radiation |
| CN102890285A (en) * | 2012-10-22 | 2013-01-23 | 中国科学院高能物理研究所 | Radiation imaging scintillation detection device employing special light transmitter |
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| US10024985B1 (en) * | 2017-05-02 | 2018-07-17 | David Edward Newman | Gamma ray detector with two-dimensional directionality |
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| US10330804B1 (en) * | 2018-02-04 | 2019-06-25 | David Edward Newman | One-dimensional directional particle detector |
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| EP0387800A3 (en) * | 1989-03-16 | 1991-07-24 | Kabushiki Kaisha Toshiba | Gamma camera device |
| JPH04132987A (en) | 1990-09-25 | 1992-05-07 | Olympus Optical Co Ltd | Radiation detecting probe |
| JPH0566275A (en) | 1991-09-09 | 1993-03-19 | Mitsubishi Atom Power Ind Inc | Directional variable radiation detector |
| JP3323323B2 (en) * | 1994-04-25 | 2002-09-09 | 浜松ホトニクス株式会社 | Scintillation camera |
| US5519227A (en) * | 1994-08-08 | 1996-05-21 | The University Of Massachusetts Medical Center | Structured scintillation screens |
| US5659177A (en) * | 1995-03-08 | 1997-08-19 | Northrop Grumman Corporation | Directional thermal neutron detector |
| US6586702B2 (en) * | 1997-09-25 | 2003-07-01 | Laser Electro Optic Application Technology Company | High density pixel array and laser micro-milling method for fabricating array |
| JP3779604B2 (en) * | 2001-01-15 | 2006-05-31 | 独立行政法人科学技術振興機構 | Radiation detector |
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| US7026627B2 (en) * | 2003-12-09 | 2006-04-11 | Delta Epsilon Instruments | Neutron/gamma ray survey instrument with directional gamma ray sensitivity |
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-
2006
- 2006-01-10 US US10/584,838 patent/US7655912B2/en not_active Expired - Fee Related
- 2006-01-10 WO PCT/JP2006/300148 patent/WO2006077752A1/en active Application Filing
- 2006-01-10 EP EP06702565.0A patent/EP1840596B1/en not_active Expired - Fee Related
- 2006-01-10 CN CN2006800008435A patent/CN101019041B/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104040374A (en) * | 2012-01-13 | 2014-09-10 | 独立行政法人放射线医学综合研究所 | Radioactive substance detection device, radiation source location visibility system, and radioactive substance detection method |
| CN102608645A (en) * | 2012-03-08 | 2012-07-25 | 重庆地质仪器厂 | Ray meter |
| CN102608645B (en) * | 2012-03-08 | 2014-03-26 | 重庆地质仪器厂 | Ray meter |
| CN103675890A (en) * | 2012-09-21 | 2014-03-26 | 日立民用电子株式会社 | Radiation measurement apparatus and radiation measurement method |
| CN103675890B (en) * | 2012-09-21 | 2016-01-20 | 日立阿洛卡医疗株式会社 | Radiation detection device and radiation measurement method |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1840596B1 (en) | 2015-08-05 |
| CN101019041B (en) | 2011-05-25 |
| EP1840596A1 (en) | 2007-10-03 |
| JP2006201086A (en) | 2006-08-03 |
| WO2006077752A1 (en) | 2006-07-27 |
| EP1840596A4 (en) | 2013-10-23 |
| US7655912B2 (en) | 2010-02-02 |
| JP4159052B2 (en) | 2008-10-01 |
| US20070221854A1 (en) | 2007-09-27 |
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